Wired broadcasting systems

Details Wired broadcasting systems Wired broadcasting systems

1975-08-06

1977-03-22

Griffin, Robert L.

Telegraphy

Systems

Printing

178DIG13, H04N 144, H04N 710

Patent

active

040139638

ABSTRACT:
A wired broadcasting system is disclosed in which a plurality of subscriber units are connected to a program exchange at which a plurality of program signals are made available by respective cables. A program selector is provided in respect of each subscriber unit and the subscriber unit is able to control the respective selector. At least one secondary program signal source is provided at the exchange and at least one subscriber unit is provided with control means for controlling the application of program signals from the secondary program source to the respective cable.

REFERENCES:
patent: 3566020 (1971-02-01), Kinross
patent: 3594496 (1971-07-01), Parton
patent: 3790700 (1974-02-01), Callais
patent: 3801735 (1974-04-01), Gabriel
patent: 3886302 (1975-05-01), Kosco
patent: 3911204 (1975-10-01), Spinelli
patent: 3914534 (1975-10-01), Forbes

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